/*globals document,window,jQuery,setTimeout,clearTimeout,animateBlocks */
/* ***********************************************************************************

	CJ Flashy Slideshow JavaScript framework

	Copyright (c) 2009, Doug Jones. All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:
	
	a) Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	  
	b) Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution. 
	  
	c) Neither the name of the Creative Juices, Bo. Co. nor the names of its
	   contributors may be used to endorse or promote products derived from
	   this software without specific prior written permission.
	
	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	For further information, visit the Creative Juices website: www.cjboco.com.
	
	Version History
	
	1.0		(10-15-2009) - Initial release.
	1.1.0	(10-16-2009) - Added directional support.

*********************************************************************************** */
(function ($) {
	$.fn.cjFlashySlideShow = function (options) {

		var settings = {
			// user editable settings
			xBlocks: 12,
			yBlocks: 3,
			minBlockSize: 3,
			delay: 3000,
			direction: 'left',
			style: 'normal',
			translucent: false,
			sloppy: false
		};

		var sys = {
			// system parameters
			version: '1.0',
			elem: null,
			imgs: [],
			block_dim_x: 0,
			block_dim_y: 0,
			sec_y: 0,
			sec_x: 0,
			current_img: 0,
			current_blocks: 0,
			current_direction: 'left',
			total_blocks: 0
		};

		/*
			utilities
		***************************************/
		function RandRange(a, b, f) {
			var v = a + (Math.random() * (b - a));
			return typeof f == 'undefined' ? Math.round(v) : v.toFixed(f);
		}

		/*
			core functions
		***************************************/
		// grab the next image
		function getNextImage(n) {
			if (parseInt(n, 10) + 1 < sys.imgs.length) {
				return sys.imgs[n + 1].src;
			} else {
				return sys.imgs[0].src;
			}
		}

		// reset our transitional blocks
		function resetBlocks() {
			var next_img = getNextImage(sys.current_img);
			$(sys.elem).find('div#cjFlashyTransitionTop div.cjFlashyTransitionBlock').each(function () {

				// radnomize the direction (if set)
				if (settings.direction === 'random') {
					var d = ['top', 'left', 'bottom', 'right'];
					settings.current_direction = d[RandRange(0, d.length - 1)];
					if (settings.current_direction === 'top') {
						$(this)[0]._start_top = settings.minBlockSize * -1;
						$(this)[0]._start_left = parseInt((sys.block_dim_x * $(this)[0]._x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					} else if (settings.current_direction === 'left') {
						$(this)[0]._start_top = parseInt((sys.block_dim_y * $(this)[0]._y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(this)[0]._start_left = settings.minBlockSize * -1;
					} else if (settings.current_direction === 'bottom') {
						$(this)[0]._start_top = $(sys.elem).height() + settings.minBlockSize;
						$(this)[0]._start_left = parseInt((sys.block_dim_x * $(this)[0]._x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					} else if (settings.current_direction === 'right') {
						$(this)[0]._start_top = parseInt((sys.block_dim_y * $(this)[0]._y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(this)[0]._start_left = $(sys.elem).width() + settings.minBlockSize;
					} else {
						$(this)[0]._start_top = parseInt((sys.block_dim_y * $(this)[0]._y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(this)[0]._start_left = parseInt((sys.block_dim_x * $(this)[0]._x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					}
				}

				$(this).css({
					'top': $(this)[0]._start_top + 'px',
					'left': $(this)[0]._start_left + 'px',
					'width': settings.minBlockSize + 'px',
					'height': settings.minBlockSize + 'px',
					'background-image': 'url(' + next_img + ')',
					'opacity': $(this)[0]._opacity
				});
			});
		}

		// handle image swaps and delay once transitional blocks are done.
		function handleBlocksDone() {
			sys.current_blocks++;
			if (sys.current_blocks === sys.total_blocks) {
				var next_img = getNextImage(sys.current_img);
				$(sys.elem).find('div#cjFlashyTransitionBottom').css({
					'background-image': 'url(' + next_img + ')',
					'background-attachment': 'scroll'
				});
				sys.current_blocks = 0;
				sys.current_img++;
				if (sys.current_img > sys.imgs.length - 1) {
					sys.current_img = 0;
				}
				resetBlocks();
				if ($(sys.elem)[0]._timer !== null) {
					clearTimeout($(sys.elem)[0]._timer);
				}
				$(sys.elem)[0]._timer = setTimeout(animateBlocks, settings.delay);
			}
		}

		// animate our transitional blocks
		function animateBlocks() {
			$(sys.elem).find('div#cjFlashyTransitionTop div.cjFlashyTransitionBlock').each(function () {
				var self = $(this)[0];
				$(self).animate({
					"top": parseInt(((sys.block_dim_y * self._y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2)) + (settings.sloppy ? RandRange(0, settings.minBlockSize) - (settings.minBlockSize / 2) : 0), 10) + "px",
					"left": parseInt(((sys.block_dim_x * self._x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2)) + (settings.sloppy ? RandRange(0, settings.minBlockSize) - (settings.minBlockSize / 2) : 0), 10) + "px"
				},
				settings.sloppy ? RandRange(350, 1250) : 650, 'linear', function () {
					$(self).animate({
						'top': self._end_top + 'px',
						'left': self._end_left + 'px',
						'width': (sys.block_dim_x * 2) + 'px',
						'height': (sys.block_dim_y * 2) + 'px',
						'opacity': 1
					},
					settings.sloppy ? RandRange(250, 850) : 650, function () {
						handleBlocksDone();
					});
				});
			});
		}

		// corrects the block's image offset to the page
		function correctOffset() {
			$(sys.elem).find('div#cjFlashyTransitionTop div.cjFlashyTransitionBlock').each(function () {
				$(this).css({
					'background-position': ($(sys.elem).offset().left - $(window).scrollLeft()) + 'px ' + ($(sys.elem).offset().top - $(window).scrollTop()) + 'px'
				});
			});
		}

		// create our transitional blocks
		function createBlocks() {
			var x, y, next_img = getNextImage(sys.current_img);
			for (y = 0; y < settings.yBlocks; y++) {
				for (x = 0; x < settings.xBlocks; x++) {

					var elem = $(sys.elem).find('div#cjFlashyTransitionTop');
					$(elem).append('<div id="cjFlashyTransitionBlock_' + y + '_' + x + '" class="cjFlashyTransitionBlock">');
					elem = $(sys.elem).find('div#cjFlashyTransitionTop div#cjFlashyTransitionBlock_' + y + '_' + x);

					$(elem)[0]._x = x;
					$(elem)[0]._y = y;

					// set up ending block location
					$(elem)[0]._end_top = parseInt(((sys.block_dim_y * y) - (sys.block_dim_y / 2)), 10);
					$(elem)[0]._end_left = parseInt(((sys.block_dim_x * x) - (sys.block_dim_x / 2)), 10);

					// determine direction
					if (settings.direction === 'random') {
						var d = ['top', 'left', 'bottom', 'right'];
						settings.current_direction = d[RandRange(0, d.length - 1)];
					}
					if (settings.current_direction === 'top') {
						$(elem)[0]._start_top = settings.minBlockSize * -1;
						$(elem)[0]._start_left = parseInt((sys.block_dim_x * x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					} else if (settings.current_direction === 'left') {
						$(elem)[0]._start_top = parseInt((sys.block_dim_y * y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(elem)[0]._start_left = settings.minBlockSize * -1;
					} else if (settings.current_direction === 'bottom') {
						$(elem)[0]._start_top = $(sys.elem).height() + settings.minBlockSize;
						$(elem)[0]._start_left = parseInt((sys.block_dim_x * x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					} else if (settings.current_direction === 'right') {
						$(elem)[0]._start_top = parseInt((sys.block_dim_y * y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(elem)[0]._start_left = $(sys.elem).width() + settings.minBlockSize;
					} else {
						$(elem)[0]._start_top = parseInt((sys.block_dim_y * y) + (sys.block_dim_y / 2) - (settings.minBlockSize / 2), 10);
						$(elem)[0]._start_left = parseInt((sys.block_dim_x * x) + (sys.block_dim_x / 2) - (settings.minBlockSize / 2), 10);
					}

					$(elem)[0]._opacity = settings.translucent ? RandRange(0.1, 0.5, 2) : 1;
					$(elem).css({
						'position': 'absolute',
						'top': $(elem)[0]._start_top + 'px',
						'left': $(elem)[0]._start_left + 'px',
						'display': 'block',
						'width': settings.minBlockSize + 'px',
						'height': settings.minBlockSize + 'px',
						'margin': '0px',
						'padding': '0px',
						'background-image': 'url(' + next_img + ')',
						'background-repeat': 'no-repeat',
						'background-position': $(sys.elem).offset().left + 'px ' + $(sys.elem).offset().top + 'px',
						'background-attachment': 'fixed',
						'opacity': $(elem)[0]._opacity
					});

					/* set up additional stylings based on style */
					if (settings.style === 'rounded') {
						$(elem).css({
							'-moz-border-radius': $(sys.elem).height() + 'px',
							'-webkit-border-radius': $(sys.elem).height() + 'px'
						});
					}
				}
			}

			// corrects the images offsets if the user scrolls the page
			$(window).scroll(function () {
				correctOffset();
			});

			// corrects the images offsets if the user resizes the page
			$(window).resize(function () {
				correctOffset();
			});
		}

		/* 
			initialize our plug-in
		***************************************/
		function init() {

			// verify the user settings
			settings.yBlocks = typeof settings.yBlocks !== "number" ? 3 : settings.yBlocks < 0 ? 1 : settings.yBlocks;
			settings.xBlocks = typeof settings.xBlocks !== "number" ? 3 : settings.xBlocks < 0 ? 1 : settings.xBlocks;
			settings.minBlockSize = typeof settings.minBlockSize !== "number" ? 5 : settings.minBlockSize < 0 ? 0 : settings.minBlockSize;
			if ($(sys.elem).width() > $(sys.elem).height() && settings.minBlockSize > $(sys.elem).width()) {
				settings.minBlockSize = $(sys.elem).width();
			} else if (settings.minBlockSize > $(sys.elem).height()) {
				settings.minBlockSize = $(sys.elem).height();
			}
			settings.delay = typeof settings.delay !== "number" ? 3000 : settings.delay < 0 ? 0 : settings.delay;
			if (settings.style !== 'rounded') {
				settings.style = 'normal';
			}
			settings.translucent = typeof settings.translucent !== "boolean" ? false : settings.translucent;
			settings.sloppy = typeof settings.sloppy !== "boolean" ? false : settings.sloppy;
			if (settings.direction !== 'top' && settings.direction !== 'left' && settings.direction !== 'bottom' && settings.direction !== 'right' && settings.direction !== 'random' && settings.direction !== 'none') {
				settings.direction = 'left';
			} else if (settings.direction === 'random') {
				var d = ['top', 'left', 'bottom', 'right'];
				settings.current_direction = d[RandRange(0, d.length - 1)];
			} else {
				settings.current_direction = settings.direction;
			}

			// setup some initial variables
			sys.imgs = $(sys.elem).find('img');
			sys.block_dim_x = Math.ceil($(sys.elem).width() / settings.xBlocks);
			sys.block_dim_y = Math.ceil($(sys.elem).height() / settings.yBlocks);
			sys.offset_x = parseInt((parseInt($(sys.elem).css("width"), 10) - (sys.block_dim_x * settings.xBlocks)) / 2, 10);
			sys.offset_y = parseInt((parseInt($(sys.elem).css("height"), 10) - (sys.block_dim_y * settings.yBlocks)) / 2, 10);
			sys.total_blocks = settings.xBlocks * settings.yBlocks;
			sys.current_img = 0;
			sys.current_blocks = 0;

			$(sys.elem).append('<div id="cjFlashyTransitionBottom">');
			$(sys.elem).find('div#cjFlashyTransitionBottom').css({
				'position': 'absolute',
				'top': '0px',
				'left': '0px',
				'display': 'block',
				'width': $(sys.elem).css("width"),
				'height': $(sys.elem).css("height"),
				'margin': '0px',
				'padding': '0px',
				'background-image': 'url("' + sys.imgs[sys.current_img].src + '")',
				'background-repeat': 'no-repeat',
				'background-attachment': 'scroll',
				'z-index': 1,
				'overflow': 'hidden'
			});

			$(sys.elem).append('<div id="cjFlashyTransitionTop">');
			$(sys.elem).find('div#cjFlashyTransitionTop').css({
				'position': 'absolute',
				'top': sys.offset_y + 'px',
				'left': sys.offset_x + 'px',
				'display': 'block',
				'width': sys.block_dim_x * settings.xBlocks + 'px',
				'height': sys.block_dim_y * settings.yBlocks + 'px',
				'margin': '0px',
				'padding': '0px',
				'z-index': 2,
				'overflow': 'hidden'
			});

			createBlocks();
			$(sys.elem)[0]._timer = setTimeout(animateBlocks, settings.delay);
		}

		/* 
			set up any user passed variables
		***************************************/
		if (options) {
			$.extend(settings, options);
		}

		/* 
			begin
		***************************************/
		return this.each(function () {
			sys.elem = this;
			if (sys.elem) {
				init();
			}
		});
	};
})(jQuery);